公开(公告)号：US20250089560A1

公开(公告)日：2025-03-13

申请号：US18897415

申请日：2024-09-26

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi SEO ,  Tsunenori Suzuki ,  Naoaki Hashimoto

IPC: H10K85/60 ,  H10K50/11 ,  H10K50/155 ,  H10K50/16 ,  H10K50/84 ,  H10K101/30 ,  H10K101/40

Abstract: Provided is a novel light-emitting element, a light-emitting element with a long lifetime, or a light-emitting element with high emission efficiency. The light-emitting element includes an EL layer between a pair of electrodes. The EL layer includes at least a light-emitting layer containing a fluorescent substance and a host material, a first electron-transport layer containing a first electron-transport material, and a second electron-transport layer containing a second electron-transport material, which are in contact with each other and in this order. The LUMO level of each of the host material and the second electron-transport material is higher than the LUMO level of the first electron-transport material.

公开(公告)号：US12082429B2

公开(公告)日：2024-09-03

申请号：US17048642

申请日：2019-10-03

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Satoshi Seo ,  Tsunenori Suzuki ,  Takumu Okuyama ,  Yusuke Takita ,  Naoaki Hashimoto ,  Hiromi Seo ,  Nobuharu Ohsawa ,  Toshiki Sasaki ,  Shunpei Yamazaki

IPC: H10K50/11 ,  H10K50/15 ,  H10K50/16 ,  H10K50/17 ,  H10K85/60 ,  H10K101/30 ,  H10K101/40 ,  H10K85/30 ,  H10K101/10

CPC classification number: H10K50/11 ,  H10K50/15 ,  H10K50/16 ,  H10K50/17 ,  H10K85/30 ,  H10K85/342 ,  H10K85/615 ,  H10K85/622 ,  H10K85/626 ,  H10K85/636 ,  H10K85/657 ,  H10K85/6572 ,  H10K85/6574 ,  H10K85/6576 ,  H10K2101/10 ,  H10K2101/30 ,  H10K2101/40

Abstract: A novel light-emitting device is provided. Alternatively, a light-emitting device with high emission efficiency is provided. Alternatively, a light-emitting device having a long lifetime is provided. Alternatively, a light-emitting device having low driving voltage is provided. A light-emitting device including an EL layer including a first layer, a second layer, a third layer, a light-emitting layer, and a fourth layer in this order from the anode side is provided. The first layer includes a first organic compound and a second organic compound. The fourth layer includes a seventh organic compound. The first organic compound exhibits an electron-accepting property with respect to the second organic compound. The HOMO level of the second organic compound is from −5.7 eV to −5.4 eV. The HOMO level of the seventh organic compound is −6.0 eV or higher.

公开(公告)号：US12063856B2

公开(公告)日：2024-08-13

申请号：US17703524

申请日：2022-03-24

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yui Yoshiyasu ,  Naoaki Hashimoto ,  Tatsuyoshi Takahashi ,  Sachiko Kawakami ,  Satoshi Seo

IPC: H10K85/60 ,  H10K50/16

CPC classification number: H10K85/6572 ,  H10K85/615 ,  H10K85/626 ,  H10K85/654 ,  H10K50/16

Abstract: A novel mixed material for a light-emitting device with improved heat resistance is provided. The mixed material for a light-emitting device includes a first heteroaromatic compound and a second heteroaromatic compound. The first heteroaromatic compound includes a first heteroaromatic ring. The first heteroaromatic ring includes a ring including two or more nitrogen atoms and any one of a benzene ring and a pyridine ring or a ring including a diazine ring or a triazine ring. The second heteroaromatic compound includes a second heteroaromatic ring. The second heteroaromatic ring includes a ring including two or more nitrogen atoms and any one of a benzene ring and a pyridine ring or a ring including a diazine ring or a triazine ring. A structure of the first heteroaromatic ring is different from a structure of the second heteroaromatic ring.

公开(公告)号：US11925097B2

公开(公告)日：2024-03-05

申请号：US18134638

申请日：2023-04-14

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Taisuke Kamada ,  Ryo Hatsumi ,  Daisuke Kubota ,  Naoaki Hashimoto ,  Tsunenori Suzuki ,  Harue Osaka ,  Satoshi Seo

IPC: H10K65/00 ,  H10K39/32 ,  H10K50/16 ,  H10K50/17 ,  H10K50/86 ,  H10K59/12 ,  H10K59/40 ,  H10K101/30

CPC classification number: H10K65/00 ,  H10K39/32 ,  H10K50/16 ,  H10K50/17 ,  H10K50/865 ,  H10K59/12 ,  H10K59/40 ,  H10K2101/30

Abstract: An object is to provide a highly reliable display unit having a function of sensing light. The display unit includes a light-receiving device and a light-emitting device. The light-receiving device includes an active layer between a pair of electrodes. The light-emitting device includes a hole-injection layer, a light-emitting layer, and an electron-transport layer between a pair of electrodes. The light-receiving device and the light-emitting device share one of the electrodes, and may further share another common layer between the pair of electrodes. The hole-injection layer is in contact with an anode and contains a first compound and a second compound. The electron-transport property of the electron-transport layer is low; hence, the light-emitting layer is less likely to have excess electrons. Here, the first compound is the material having a property of accepting electrons from the second compound.

公开(公告)号：US20240023423A1

公开(公告)日：2024-01-18

申请号：US18216285

申请日：2023-06-29

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Tsunenori Suzuki ,  Naoaki Hashimoto ,  Eriko Sauo ,  Satoshi Seo

IPC: H10K85/30 ,  H10K50/11 ,  H10K50/13 ,  H10K50/16

CPC classification number: H10K85/342 ,  H10K50/11 ,  H10K50/13 ,  H10K50/16 ,  H10K85/622

Abstract: A light-emitting element which includes a plurality of light-emitting layers between a pair of electrodes and has low driving voltage and high emission efficiency is provided. A light-emitting element including first to third light-emitting layers between a cathode and an anode is provided. The first light-emitting layer includes a first phosphorescent material and a first electron-transport material; the second light-emitting layer includes a second phosphorescent material and a second electron-transport material; the third light-emitting layer includes a fluorescent material and a third electron-transport material; the first to third light-emitting elements are provided in contact with an electron-transport layer positioned on a cathode side; and a triplet excitation energy level of a material included in the electron-transport layer is lower than triplet excitation energy levels of the first electron-transport material and the second electron-transport material.

公开(公告)号：US11569466B2

公开(公告)日：2023-01-31

申请号：US16541451

申请日：2019-08-15

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Satoshi Seo ,  Tsunenori Suzuki ,  Yusuke Takita ,  Naoaki Hashimoto

IPC: H01L51/00 ,  H01L51/50 ,  C07D209/82 ,  H01L51/56

Abstract: A novel light-emitting element is provided. A light-emitting element with a long lifetime is provided. A light-emitting element with high emission efficiency is provided. In the light-emitting element, an EL layer includes a hole-injection layer, a first hole-transport layer, a second hole-transport layer, a third hole-transport layer, a light-emitting layer, a first electron-transport layer, and a second electron-transport layer in this order; the hole-injection layer includes an organic acceptor; the LUMO level of the host material is higher than that of the first electron-transport layer; the LUMO level of the second electron-transport layer is higher than that of the first electron-transport layer; the host material is a substance including a condensed aromatic ring skeleton; and the first and second electron-transport layers each include a substance having a heteroaromatic ring skeleton.

公开(公告)号：US11555030B2

公开(公告)日：2023-01-17

申请号：US16609284

申请日：2018-04-20

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takuya Haruyama ,  Sachiko Kawakami ,  Naoaki Hashimoto ,  Yusuke Takita ,  Tsunenori Suzuki ,  Satoshi Seo

IPC: C07D307/77 ,  C07D407/12 ,  H01L51/00 ,  H01L51/50 ,  H01L51/52

Abstract: An organic compound has a benzonaphthofuran skeleton and is represented by General Formula (G1). In General Formula (G1), A represents a pyrene skeleton. In the case where the pyrene skeleton has a substituent, the substituent is a diarylamino group including two substituted or unsubstituted aryl groups each having 6 to 13 carbon atoms, a substituted or unsubstituted aryl group having 6 to 13 carbon atoms, an alkyl group having 1 to 7 carbon atoms, a substituted or unsubstituted monocyclic saturated hydrocarbon group having 3 to 20 carbon atoms, or a substituted or unsubstituted polycyclic saturated hydrocarbon group having 7 to 10 carbon atoms. The two aryl groups of the diarylamino group may be the same or different. In X1 represented by General Formula (G1-1), one of R6 and R7 is bonded to N in General Formula (G1), and the other of R6 and R7 represents an alkyl group having 1 to 7 carbon atoms, a substituted or unsubstituted monocyclic saturated hydrocarbon group having 3 to 20 carbon atoms, or a substituted or unsubstituted polycyclic saturated hydrocarbon group having 7 to 10 carbon atoms.

公开(公告)号：US20220336755A1

公开(公告)日：2022-10-20

申请号：US17703524

申请日：2022-03-24

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yui Yoshiyasu ,  Naoaki Hashimoto ,  Tatsuyoshi Takahashi ,  Sachiko Kawakami ,  Satoshi Seo

IPC: H01L51/00

Abstract: A novel mixed material for a light-emitting device with improved heat resistance is provided. The mixed material for a light-emitting device includes a first heteroaromatic compound and a second heteroaromatic compound. The first heteroaromatic compound includes a first heteroaromatic ring. The first heteroaromatic ring includes a ring including two or more nitrogen atoms and any one of a benzene ring and a pyridine ring or a ring including a diazine ring or a triazine ring. The second heteroaromatic compound includes a second heteroaromatic ring. The second heteroaromatic ring includes a ring including two or more nitrogen atoms and any one of a benzene ring and a pyridine ring or a ring including a diazine ring or a triazine ring. A structure of the first heteroaromatic ring is different from a structure of the second heteroaromatic ring.

公开(公告)号：US11225488B2

公开(公告)日：2022-01-18

申请号：US16090477

申请日：2018-02-28

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Kyoko Takeda ,  Harue Osaka ,  Satoshi Seo ,  Tsunenori Suzuki ,  Naoaki Hashimoto ,  Yusuke Takita

IPC: C07D495/04 ,  C07D495/00 ,  H01L51/00 ,  C07D491/048

Abstract: A novel organic compound is provided. Alternatively, an organic compound that exhibits light emission with favorable chromaticity is provided. Alternatively, an organic compound that exhibits blue light emission with favorable chromaticity is provided. Alternatively, an organic compound with favorable emission efficiency is provided. Alternatively, an organic compound having a high carrier-transport property is provided. Alternatively, an organic compound with favorable reliability is provided. An organic compound including at least one amino group in which any one of a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted dibenzothiophenyl group, and a substituted or unsubstituted carbazolyl group is bonded to any one of a substituted or unsubstituted naphthobisbenzofuran skeleton, a substituted or unsubstituted naphthobisbenzothiophene skeleton, and a substituted or unsubstituted naphthobenzofuranobenzothiophene skeleton is provided.

公开(公告)号：US11050032B2

公开(公告)日：2021-06-29

申请号：US16791231

申请日：2020-02-14

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Naoaki Hashimoto ,  Tsunenori Suzuki ,  Satoshi Seo ,  Hiromi Seo ,  Hiromitsu Kido

IPC: H01L51/50 ,  H01L27/32 ,  H01L51/52 ,  H01L51/00

Abstract: A light-emitting element that includes a fluorescent material and has a high emission efficiency is provided. A light-emitting element in which a delayed fluorescence component due to TTA accounts for a high proportion of emissive components is provided. A novel light-emitting device with a high emission efficiency and a low power consumption is provided. A light-emitting element includes an anode, a cathode, and an EL layer. The EL layer includes a light-emitting layer including a host material and an electron-transport layer including a first material in contact with the light-emitting layer. The LUMO level of the first material is lower than that of the host material. The proportion of a delayed fluorescence component due to TTA is greater than or equal to 10 percent of the light emission from the EL layer. The proportion of the delayed fluorescence component due to TTA may be greater than or equal to 15 percent of the light emission.